492 



INDEX. 



Biotite of muscovite-biotite-granite 193 



of peridoiite 252,257,261 



of iiicrite-porphyry 215 



of pyroclastics 147 



of sedimentaries developed by intrusion 195 



of sedimentary inclusions in granite 197 



of spiloaite 206 



orientation of 393,425,468,486 



parallel growth "witb muscovite 170 



penetrating feldspar 41i 



pressure effects in 43, 248 



relations of orientation to hornblende . - - 486 



relations of orientation to muscovite 484 



replacing feldspar 193 



Biotite-gneiss of Archean 429 



Biotite-granite described 40-43, 191-193 



banding of 43, 44 



plate of 308 



micropegmatitic strncturo in, described 192-193 



scliistosity of 44 



Biotite-schist of Algonkian of Sturgeon River tongne 484 



of Arcbean of Sturgeon Eiver tongue 467-469 



of Hemlock formation- 442 



Birliinbino, John, on ore shipments 186 



Blaney mine. {See Hope mine.) 



Blocklava. (-S'eeEUipsoidalstructure, Aastructure ) 



Bog iron ore of Upper Huronian 182 



Bone Lake described 35 



referred to * 156 



Bone Lake crystalline schists described 148-152 



Bonney, T. G.,on alteration of olivine 218 



on ellipsoidal structure llS-119 



Botryoidal ore 180 



Brackett, R. N., on xiltrabasic iutrusives 220 



Brauner, J. C , on ultrabasic intrusives 220 



Breccia, eruptive, of Hemlock formation, described. 135-136 



volcanic, use of term 137 



Brecciation of Groveland formation 418 



of metabasalt 117 



Brittany granite compared with Crystal Falls granite 44 



Brogger, W. C.,on diorite andgabbro families 242 



on monzonite group 232 



on rock analyses 105 



on use of term diorite 222 



BroD zite altering to serpentine 238 



plate of 306 



altering to talc 238 



plate of 306 



included in hornblende 250 



plate of - 306 



includir-g ilmenite 238 



including rutile 238 



in zonal intergrowth with hornblende, plate uf . . 318 



of brouzite-uorite 244 



plate of 318 



alteration of, plate of 306 



of bronzite-norile-porphy ry 246 



of gabbro and norite 238 



of peridotite 250 



Bronzite-norite described 244r-247 



plate of 318 



analysis of 245 



crystallization of minerals 262 



intruding hornblende-gabbro 243, 249, 265 



Bronzite-norite-porphyry 246 



plate of 320 



Bronzite-norite-porphyrj- altering to serpentine 246 



intruding hornblende-gabbro 249 



Brooks, A. H., referred to 22 



Brooks, T. B., on composition of iron ore 181 



on correlation of Slenominee rocks 19 



on correlation of Upper Huronian 164 



on Felch Mountain range 376, 377. 378, 379 



on iron-bearing rocks of Michigan 16-17 



on magnetic observations 24, 337 



on Menominee district 19 



on Mesnard series 452 



on Paint River district 11 



on Sturgeon River tongue 460-461 



on Upper Huronian 172, 173 



referred to xv, 21 



Brooks, Rominger, and Pumpelly, map of Uppei' Pen- 

 insula of ilichigan 18 



Brown, E 3?., on analysis of iron ore 69 



Brule River described 31 



referred to 13, 15, 161 



Building stones of Hemlock formation described. . . 153, 154 

 Burt, William A., map of part of Upper Peninsula . 15 



on Crystal Falls rocks 13 



on Felch Mountain range 375 



on Sturgeon River tongue 460-461 



referred to 16,21 



Calciferous limestone, relations to Potsdam 383 



Calcification of chlorite 132 



of feldspar , 131 



of metabasalt 117,130,132,133.134 



Calcite, alteration of 146 



altering to limonite 153 



developed by dynamic action 432 



from biotite 192,225 



from feldspar 82,90,131,132 



from hornblende 203, 21 5 



of acid lavas 89, 93 



of amygdulea 124 



plate of 282 



of basic dikes --- 47 



of biotite-granite 192 



of ellipsoidal metabasalt, plate of 292 



of Groveland formation 420 



of marble 481 



of metabasalt 100, 101, 117, 127. 128, 129, 132 



plate of 290 



of metadolerite 203 



of peridotite 252 



of pyroclastics 146, 147 



of tutf 142 



orientation of 132 



pseudomorphs after feldspar 132 



replaced by iron carbonate 133 



replacing chlorite 132 



replacing feldspar 131 



Caledonia mine, {See Mansfield mine.) 



Calumet and Heckla mine 399 



Cambrian sandstone 29 



deposition of xxiv 



erosion of xxiv 



relations to Algonkian 331,473 



relations to Archean xxiv, 26, 331 



relations to Ke weenawan 162 



relations to intrusi ve.q 188 



